I say buy a PS Audio Powerplant Premier.
It has a distortion meter and gives you percentage distortion of raw power vs. after it has been regenerated. Usually around 3-5% distortion from the wall, and .3-.5% after regeneration. (one tenth of what it was)
This way you know not only how bad your power is, but what it sounds like cleaned up. PS gear has a 30 day money back, so if it's worhwhile on your system, you'll find a way to pay it off, and if the improvement was not substantial enough, send it back. All you lost was the shipping.
It has a distortion meter and gives you percentage distortion of raw power vs. after it has been regenerated. Usually around 3-5% distortion from the wall, and .3-.5% after regeneration. (one tenth of what it was)
This way you know not only how bad your power is, but what it sounds like cleaned up. PS gear has a 30 day money back, so if it's worhwhile on your system, you'll find a way to pay it off, and if the improvement was not substantial enough, send it back. All you lost was the shipping.